Egypt's Muslim Brotherhood, the primary group supporting the constitution, cheered the outcome.

"Let's all begin to build the renaissance of our country with free will, good intentions and strong determination, men, women, Muslims and Christians," wrote the group's leader, Mohammed Badie, on Twitter, CBS News reported.

The opposition, which had staged massive street protests against the proposed constitution, has vowed to challenge the results of the referendum, CBS News added.

Opposition members fear that the constitution will pave the way to Islamic rule in Egypt.